Input controller



Aug. 17, 1948. J. MORTON INPUT CONTROLLERS 4 Sheets-Sheet 1 Filed Aug. 21, 1945 mum/70;? Jaws Ala/P70 Tilc l. V

Aug. 17, 1948. J. MORTON 2,447,356

INPUT CONTROLLERS Filed Aug. 21, 1945 I 4 Sheets-Sheet 2 TiH-E- --/v.s- MORTON v ATTORNEYS g- 17, 1943- J. MORTON 2,447,356

INPUT CONTROLLERS Filed Aug. 21, 1945 4 Sheets-Sheet 4 //v/ /v7'o/? Jew: MORTON Patented Aug. 17, 1948 UNITED STATES PATENT OFFICE INPUT CQNTROLLER Jens Merton, Philadelphia, Pa., assignor to Automatic Temperature Control (30., Inc., Philadelphia, Pa, a corporation of Pennsylvania Application August 21, 1945, Serial No. 611,875

22 Claims. 1

This invention relates to input controllers, having particular reference to a device for regulating the relative times of power on and power off in the supply of current to an electric furnace.

There have been many devices for this purpose developed in the past, and many have been relatively satisfactory, but have possessed certain disadvantages, either in the matter of expense and complexity or in the necessity for the control of relatively small potentials, and in some cases the design has been such as to preclude the long life and freedom from necessary adjustments and replacements essential for such controlling systems.

It is among the objects of this invention: to provide an input controller of enhanced efficiency and long life; to obviate the disadvantages of prior art input controllers; to provide an input controller of efficiency and long life while being cheap and simple to construct; to provide an input controller of rugged construction capable of handling heavy potentials; to provide an input controller with a calibrated dial so arranged that the more frequently used part of the working dial is always in front of the operator instead of being concealed by the operators hand as in earlier constructions; to provide an input controller by which the current flows without interruption when the instrument is set for 100% current input, despite timed rotation of the moving mechanisms; and other advantages will become more apparent as the description proceeds.

In carrying out the invention in a preferred instrument embodiment, a continuously driven timed shaft is provided driven by a timing motor and carrying a disc upon which a bell crank lever is mounted, A two-position rock member is pivoted to the instrument frame in operative relation at one end with circuit-making and breaking contacts. A slidable sleeve is mounted on the drive shaft and arranged for axial movement thereon movable normally in one direction by the bell crank lever, and movable in the other direction by the rock member in moving from one position of circuit-making to its other position of circuit-breaking. An adjustable tripping device is provided adjacent to the disc, carrying means for periodically moving the bell crank lever in adjustments angularly relative to the disc, for moving the sleeve in one direction to rock the rock element to open the circuit, and means are provided in predetermined fixed angular relation to the disc, driven by the. shaft Cir for periodically rocking the member to open the circuit and move the sleeve axially to reset the bell crank. The tripping mean in one given angular position engages an extension on the rock member to positively actuate the same to one rock position to establish and maintain a made circuit regardless of tripping actuations. Means are provided for preventing the tripping of the bell crank from actuating the sleeve to interrupt the circuit made in the one given angular position of the tripping means, and means are provided for varying the relative angular relation of the tripping means relative to the axis of the driven shaft.

In the accompanying drawings forming part of this description:

Fig. 1 represents a front elevation of the instrument according to a preferred embodiment, partially broken away, and showing the relative arrangement of dial and indicating pointer.

Fig. 2 represents a side elevation of the instrument, partially in section, in the housing therefor, shown in vertical section.

Fig. 3 represents a horizontal transverse section of the instrument taken on line 3-3 of Fig. 2, showing the driven parts in one angular disposition and with the controlling sleeve pushed rearwardly on the drive shaft, and with the parts in circuit-breaking relation. Fig. 4 represents a similar horizontal transverse section of the instrument, from the same view as the section comprising Fig. 3, showing the driven parts in a successive stage of angular disposition, and with the controlling sleeve pushed forwardly on the driving shaft, and with the parts in circuit-malring relation.

Fig. 5 represents a partial vertical section of the instrument, taken on line 5-5 of Fig. 2, and showing the frictional device for holding the pointer in a set position.

Fig. 6 represents a partial section taken on line 6-6 of Fig. 3, showing in full lines the sleeveactuating bell crank on the driven disc in the position to which it is moved by contact of its actuating dwell with the adjustably positioned roller controlled by the position of the pointer for the instrument, as it has reached its maxi- :mum position of inward movement under the roller to move the sleeve toward circuit-open- .ing position, and in dotted lines showing a successive angular position in which the actuating dwell has been returned to an operative position extending beyond the periphery of the disc, after the associated bell crank has been moved into a position in which the sleeve has moved to circuit-making position.

Fig. 7 represents a partial section taken on line 'II of Fig, 4, showing the rock member and sliding sleeve connection.

Fig. 8 represents a fragmentary section taken on line 88 of Fig. '7, showing in full lines a position of resetting cam and the lu on the rock member, at th instant that the rock element has been moved to close the circuit, and in dotted lines the relative positions of the parts during circuit opening.

Fig. 9 represents a fragmentary section taken on line 99 of Fig. 2, showing the circuit-making and breaking means.

Fig. 10 represents a fragmentary section showing the relation of the rocking member to the cam slope on the adjustable tripping member, when the tripping member is positively moved to retain the made circuit.

Referring to Fig. 1, the front of the instrument assembly is shown, comprising a housing of conventional form Ill in which the instrument II is mounted. The instrument has a front panel I2 disposed behind the apertured front face IQ of the housing I0, and on which there is mounted the circular dial I3 calibrated for convenience into units of from zero at 100 at the lower center of the dial, through equal angular divisions and sub-divisions as at I4, to 100, representing percentages of time. A manual control knob l5 extends through the dial I3, and controls the angular position of a pointer I6 sweeping the calibrations M and mounted on the control shaft, to bedescribed. A supporting panel H is shown, upon which an insulating terminal block IB is mounted, carrying preferably two sets of pairs of binding posts or terminals and buss bars. Illustratively, a pair of power connectors are shown joined to the lower terminals 20 and 2I on the respectivebuss bars 22 and 23, from which the current is supplied for running the timing motor 48, to be described, and which is lead to and from the motor through terminals 24 and 25 respec tively on the respective buss bars 22 and 23. In laterally spaced relation, and well insulated therefrom, are the furnace circuit buss bars 26 and 21, carrying the lower terminals 28 and 30 respectively, to which leads extend to a furnace or to a supplemental controlling system or relay, while the upper terminals thereof, respectively 3! and 32, extend into the instrument for electrical connection to the circuit controlling contacts, to be described. A stop pin 29 is preferably provided at the lower center of the dial between graduation No. 1 and No. 100, against which the pointer IE controlled by the knob abuts at the calibration I4 designated as point 100, on one side thereof, while abutting the pin adjacent graduation No. 1, on the other, depending upon whether the instrument is set for substantially no percentage of input, or of 100% thereof, and this latter is coincident with the calibration I4 identified on the dial as 100. It will be observed that the 50% calibration M is at the top of the dial, and as most of the adjustments are within a reasonable range of this point, during the actual run ning of the instrument after starting, this is very easily accomplished without the adjustment being interfered with visually by the hand of the operator grasping the knob I5.

Referring to Figs. 2, 3 and l, it will be observed that the knob I5 is anchored to a control shaft 33 journalled in the front panel l2 and extending through the center of the dial and the housing glass or other transparent cover 39 ,supported thereby, and the indicating pointer I6 is keyed to the shaft 33. The latter is enlarged inwardly of the front panel I2 into an enlarged head 34. The enlarged head 34 has a peripheral groove 35 on its outer periphery into which resilient wires 36 extend, arranged to bear laterally against the groove to impart a frictional drag thereto to hold the shaft Wherever it is manually set by knob I5. The drag wires 36 are anchored suitably to the inner surface of the front panel as at 31. The head enlargement 34 of the shaft 33 is axially apertured on its rearward face concentric with shaft 33 in a bearing recess 4|] to receive and journal the forward end of a continuously driven shaft 4 I, the axis of which is coincident with that of shaft 33. Shaft 5 I as will be explained, extends perpendicularly between the front and rear panels of the instrument. Mounted rigidly on the rear face of the head enlargement 34, and extend ing radially thereof, to turn in a plane normal to the shaft 33, is a tripping arm d2, having a predetermined and fixed angular divergence, behind the dial and front panel I2, from the radial disposition of the indicating pointer I6 in front of the dial. Illustratively, this angular divergence is 90, although this is purely for convenience and any other angular relation can be used. The outer free end of the tripping lever 42 is formed with a diagonal cam slope 59, below the peak of which a perpendicular pin 43 is provided, parallel to the axis of the shaft 33. The pin 43 carries rotatable anti-friction roller sleeve M comprising the primary tripping member of the arm 42. The cam slope 49 comprises a secondary tripping member.

The continuously driven shaft M at the rear end extends through and is journalled in the rear panel 59, and carries in rear of the rear panel 59 a gear 45 splined to the shaft M, in mesh with a pinion gear 46 keyed on the output shaft 55' of a gear reduction 50. mounted inwardly of the rear panel. The gear reduction 50 is in driven relation to the armature of a preferably synchronous uni-directional constant speed motor 48. The shaft 4! is constantly driven at a carefully timed rate by the motor, and illustratively, it makes one complete rotation in sixty seconds. Toward the forward end the shaft 4| carries a driven annular disc 5 I, keyed suitably to the shaft, and disposed closely adjacent to but in parallel spaced relation relative to the tripping arm 42, and so disposed that part at least of the roller M overhangs rearwardly beyond the periphery of the disc. The disc 5| is of such diameter as to have close but non-contacting relation to and slight clearance from the roller 44 of the primary tripping element. The disc 5! has a pair of lateral ears struck rearwardly out of its surface adjacent to the outer periphery thereof, and extending perpendicularly of the disc as at 53 and 54, which form journals for a pivot pin 55. The pin 55 is disposed parallel to the disc with its axis substantially tangential to the axis of the shaft ll, in order to carry a sleeve-actuating member,

to be described. Axis pin 55 and its associated assembly is counterweighted substantially diametrically of the disc by counterweight 52 A bell crank lever is carried. by disc 5!, journailed to the pivot shaft 55 by suitable ears 5i and 58 extending from a short arm lid of the bell crank lever. Short arm. extends generally perpendicularly relative to the disc 5 l, and has a narrow reduced terminal portion 65 extending forwardly of the instrument through an aperture 62 formed in the disc 5|, in which it has a limited working substantially radially of the disc. The bell crank lever on the other side of the pivot 55 extends angularly from short arm 50 in a flat plate 63 generally perpendicular to the short arm 60, and extending toward the shaft M. The flat portion is apertured adjacent to the pivot pin 55, as at 64, and in substantial longitudinal alignment therewith carries a lateral stud 65. A plate 65 is provided arranged to overlie and engage in parallelism the flat portion 63 of the bell crank lever, and includes at one end a laterally projecting lug or ear 69 extending into the aperture 54, as a free pivot for the plate relative to the bell crank lever flat portion 53. The plate has an elongated slot 61 in which the stud 65 extends, and the outer end of the stud carries a resilient unit 58 to resiliently but yieldingly urge the plate into parallelism against and in substantial alignment with the flat part of the bell crank, while yieldingly permitting relative angular displacements thereof about the pivot formed of the lug E9 in aperture 64, in the event of resistance to joint movement of the bell crank and plate in aligned relation. The inward lower end of the flat plate 66 terminates in spaced fingers m and l! extending inwardly respectively radially of the axis of the driven shaft 4!. For actuating the bell crank by forcing the free end 6| inwardly radially of the disc 5|, a member is provided on the disc, 1

comprising a pivotally slidable actuating member '12 pivoted to the disc 5! toward one end as at 73, and disposed in parallel sliding relation to and on the disc 5|. The member 12 has a bell crank arm 14 arranged to abut the ear 53 to limit the outward movement of the member 12 on its pivot 13, and is held for limited inward motion, as well as guidably against movement away from the disc, by a struck-out ear [5 parallel to the disc 5!. The member 12 carries outwardly a pointed dwell '16, arranged to move with the member outwardly to a position extending beyond the periphcry of the disc 5!, from a position not so projected but substantially flush with the disc periphery. The actuating member also carries an inwardly directed pointed extension I! arranged to rest upon and transmit thrust to the small end of the bell crank 6!, as the outwardly directed dwell 1G is forced inwardly with the member by the roller 44 of the primary tripping element, as they relatively contact in the rotations of the disc relative to the variably positioned tripping arm. Conversely, an opposite movement of the bell crank lever on its pivot pin 55 raising lever end Bl, resets the actuating member with pointed dwell 11 extending beyond the periphery of the disc ready for the next contact with tripping roller 44 in the cyclic rotation of disc 5!.

A sliding sleeve 18 is mounted loosely on the drive shaft 4|, arranged for limited axial motion on the shaft, and is preferably formed of an in, sulating plastic material. The sleeve has a pair of recesses, or an annular groove 89 toward the front end of the sleeve, and the radial fingers l0 and H associated with the bell crank frictionally engage in groove Bil to positively move the sleeve axially in one direction with and through actuation of the bell crank lever and flat plate connections, whenever the point dwell 16 of the actuating member 12 is forced inwardly by engagement thereof by the primary tripping roller 44. This happens wherever primary tripping member 44 may be located by the controlled disposition thereof by the angular setting of the pointer or indicator I6, through manipulations of the knob IS, with one important exception. This is at the instant angular setting associated with registration of the pointer IS with calibration I4 identified as 100 abutting the stop 29, when, as will be explained, the contacts and associated parts, including the sleeve are locked in circuit-making relation. In the periodic energization of the bell crank during this angular setting of the tripping arm, relative angular lateral flexing of the bell crank and flat plate can occur, by utilizing the resilience of the resilient assembly 58.

The front and rear panels are connected by spaced pillars 3!, as is usual in such instruments, and between an adjacent pair of pillars 81, a transverse shaft 82 is mounted, the axis of which is substantially tangential to the axis of the driven shaft 41, and which shaft is disposed substantially medianly between and parallel to the respective front and rear panels. A rock element 83 is journaled on the shaft 82 for oscillation in the substantial center of the instrument, and at one side of the pivot shaft carries an :angularly divergent inwardly extending arm terminating in a yoke including a pair of radially extending fingers 85 and 85, which engage in recesses or a groove 81' formed on the rear end of the sliding sleeve 18. The arm 84 adjacent the fingers is formed with a rearwardly struck out sloping ar 88, the front edge 89 of which at the end of its slope is, illustratively, preferably parallel to the arm 84. The arm 84 and the rock element 83 and the sleeve 18 are moved rearwardly by the rearward sliding of the sleeve 18, in response to inward actuation of the bell crank lever arm 6| cyclically in the rotation of the shaft and disc. A hub 90 is keyed to the shaft 4| and carries a radially extending arm ill, carrying a cam slope 92, arranged to engage the struck-out lug 88 on the arm 84, to rock the shaft forwardly and simultaneously to force the sleeve I8 forwardly. As noted. forward movement of the sleeve resets the actuating member and bell crank lever.

The rock member 83 at the forward end adjacent to the front panel is twisted or shaped to form a tripping end 93, juxtaposed to the plane and path of motion of the tripping arm 42, overlying and in position to be engaged and the forward end of the rock element raised, by the sloping cam surface 49 on the tripping arm in order to lock the contacts, to be described, in circuitclosing engagement as the indicator pointer I6 is moved to the 100% indication. At the rearward end the rock member is sharpened as at 94, and is arranged to engage in one position the upper surface of a stop or detent stud mounted on a spring arm 8? mounted on and generally parallel to the rear panel 89, which stud is of generally rounded contour having a frictional engagement with the sharpened end of the rock member to retain the rock member in a given raised or lowered position until positively moved by the mechanism previously discussed. A second stud S6 is provided spaced from the first as to form a stop recess in which the end of the rock member is fricti'onally held in an inward, circuitclosing position,

Mounted on the rear panel, in insulated relation thereto, is the rigid bracket arm I!!!) carrying toward its free end a guide cylinder lfll in which a plunger IE2 is guided in position to be engaged and depressed by the end of the rock member adjacent to the sharpened end thereof. A resilient contact-making arm I94 is mounted on the under side of the bracket arm in position to be flexed downwardly :away from the bracket arm I011. The resilient arm HM carries a contact m5, in position to engage and establish a circuit with a yielding contact I06 carried on a resilient arm Hi9 mounted below a relatively rigid bracket I91, when depressed by the plunger M32. The working circuits are connected to terminals for the respective contact-making arms, as will be understood.

The instrument in use is suitably wired to the motor-driving circuits by means of the terminals 20 and 2 l, and the motor M is then continuously driven in a timed output of the illustrative sixty seconds of drive shaft 4%. The relay or electronic or other furnace control system is wired to the respective terminals 28 and 33 of the instrument, and the instrument is ready for its timing function. It will be understood, of course, that the leads from the upper terminals 24 and 25, and 3| and 32, will already have been properly established in the instrument. Assuming a cold furnace which is to be brought up to heat in the shortest interval possible, the control knob l will be turned angularly toward bringing the pointer 56 against the pin 29, in which it will overlie the 100% calibration M. This swings the internally disposed tripping lever d2 to a position relative to the overhanging end 93 of the rock member .83, to be engaged by some lower portion of the cam slope id of the tripping lever, and continuation of the knob rotation to attain the 100% setting forces the end 93 of the rock member upwardly on the cam slope 4-9 until the sharpened end 94 rides over the spring pressed detent 95 to a position between detents 95 and 9S, and thus forces the plunger m2 downwardly to force the flexible contact member 58 downwardly to establish circuit-making engagement between the contact points Hi5 and M36. The latter are in connection respectively with the terminals 3i and 372, and control the working circuit. The circuit-making arrangement is maintained during the time that the tripping lever is engaged with the end 93 of the rock member 8.3. However, durin this entire interval, regardless .of its duration, and which is controlled by the operator who keeps track of the furnace temperature, or who by experience knows the length of time of full 108% input necessary to attain the desir d temperature. of the end 93 of the rock member 83, through the engagement thereof by the cam slope forces the arm 3d toward the front of the instrument, the sleeve i8 is also moved forwardly to the position it always assumes during the making of the circuit. As the drive shaft M rotates and the disc 5i rotates with it, the radially projecting cam dwell 75 on the actuating slide lever engages and is forced inwardly by the roller 43 of the primary tripping means on arm 52, and rides thereunder by being pushed radially inwardly until below the roller, which will be approximately at the peripheral edge of the disc. This forces the inner point Tl thereof substantially radially against the narrow end 6! of the bell crank lever and forces the latter to swing on its pivot 55. As at this juncture, however, the sleeve i8 is held forwardly, the flat plate 56 connected by its fingers 'iii and 'H in the groove 8% is held at the lower end against movement with the bell crank lever, and the plate simply assumes a position of :relative angularity tothe flat end of the bell crank lever, through the resilient and pivotal connections between the parts. In the cyclic rotation of the drive shaft the driven arm 9i car- As the raising rying the cam slope 92 passes across the front of, but without moving or actually contacting the struck-out lug 88 of the arm 84 of the rock member, as the latter arm has been previously swung with the rock member 83 to the circuitmaking position in which the arm 84 moves forwardly with the sleeve 18 to which it is pivotally connected.

Assume now that the furnace has reached the desired temperature and it is desired to modify the input to maintain the attained temperature of the furnace. The operation, to be described, will pertain to any situation in which proportionality of on and off is desired within the time cycle of the instrument, whether it be a high relative proportion of power input to the furnace, attendant, for instance, upon the placing therein of cold work, or a low relative proportion of power on, attendant, for instance, upon the removal of heated work, or for any other control purposes that may arise. Let it be assumed for pure example, that it is desired to divide the cycle into two equal periods in the complete cycle, of which one is power on and the other is power 0 This is represented by the disposition of the pointer Iii in overlying relation to the calibration l 3 representing 50%, at the top of the dial, The tripping lever 42 will be backed away from its previous position in raising contact with the end 93 of the rock member 83, which will for a short interval, possibly, remain where it was, depending upon the instant angular disposition of the parts driven by shaft H, with the sharp end 9 disposed between the frictional retaming studs and 96, and with the plunger H12 still depressed and the contacts in engagement. In due course, the elevated point dwell of the actuating element will engage and ride under the roller 44 of the primary tripping element and the bell crank lever will be actuated as before, but this time, as the sleeve is not held against axial sliding except by its own negligible friction, and that offered by the associated parts, including that offered by the rounded stud 95 to the passage of the sharpened end 9! of the rock shaft, which latter is a function of the resilience of the spring arm carrying the studs 95 and 96, the lower plate 66 of the bell crank lever will force the sleeve 78 rearwardly, thus moving the arm 84 rearwardly, and rocking the rock member 83 so that the end Ell slides over the stud 95 to a disposition just above it. This releases the pressure on the plunger Hi2 and the spring contact arm HM follows the plunger upwardly to separate the contacts and break the circuit. After thirty seconds of rotation of the drive shaft All, the cam slope 92 on the arm on engages the struck-out lug 88 on the arm 84, forcing it forwardly, and thus forcing the sleeve l8 forwardly to reset the bell crank lever for its next actuation by the primary trip element, and also moves the rock member so that the sharpened end slides over stud 95 to retained position between studs 95 and 96 while, of course, actuating the plunger N12 to close the circuit through the contacts. This established circuit maintains for thirty seconds when it is again interrupted by the cam slope on the driven arm 9!, and the circuit is made for another thirty seconds, and so on.

The relative times on and off can be proportioned by suitably positioning the indicator pointer 86 from 1% or a fraction thereof, to the full 100%, and the disposition of the dial with the median portion upwardly facilitates the easy adjustment of the pointer in the more cominonly used range of from perhaps 20% to 80% of input;

The simplicity, ruggedness and the advantages of the instrument are thought to be obvious.

Having thus described my invention, I claim:

1. In timers for controlling an electric circuit, a. driven member, a single circuit-controlling switch as the sole circuit-controlling element of the timer, switch-operating means movable between two positions corresponding respectively to make and break of the circuit controlled by the timer, means driven by the member for moving the operating means to one of its said positions once during a complete movement of the driven member, a second means driven by the member for moving the operating means to the other of its said positions once during a complete movement of the driven member, and means manually settable during movement of said member for varying the time interval between the respective movements of the switch-operating means.

2. In timers for controlling an electric circuit, a driven member, a single circuit-controlling switch as the sole circuit-controlling element of the timer, switch-operating means movable between two positions corresponding respectively to make and break of the circuit controlled by the timer, means driven by the member for moving the operating means to one of its said positions once during a complete movement of the driven member, a second means driven by the member for moving the operating means to the other of its said positions once during a complete movement of the driven member, means manually settable during movement of said member for varying the time interval between the respective movements of the switch-operating means, the manually settable means including an element for moving the switch-operating means to one of its two positions and for nullifying the action of the respective moving means driven by the member during a complete member movement.

3. In timers for controlling an electric circuit, a driven member, a single circuit-controlling switch as the sole circuit-controlling element of the timer, switch-operating means movable between two positions corresponding respectively'to make-and break of the circuit controlled by the timer, means driven by the member for moving the operating means to one of its said positions once during a complete movement of the driven member, a second means driven by the member for moving the operating means to the other of its said positions once during a complete movement of the driven member, and means manually settable during movement of said member for varying the time interval between the respective movements of the switch-operating means, said driven member comprising a continuously rotated shaft.

4. In timers for controlling an electric circuit, a driven member, a single circuit-controlling switch as the sole circuit-controlling element of the timer, switch-operating means movable between two positions corresponding respectively to make and break of the circuit controlled by the timer, means driven by the member for moving the operating means to one of its said positions once during a complete movement of the driven member, a second means driven by the member for moving the operating means to the other of its said positions once during a complete movement of the driven member, means manually settable during movement of said member for varying the time interval between the respective movements of the switch-operating means, said member comprising a continuously rotated shaft, and said switch-operating means comprising a reciprocable element operatively associated with both of said moving means driven by the shaft.

5. In timers for controlling an electric circuit, a driven member, a single circuit-controlling switch as the sole circuit-controlling element of the timer, switch-operating means movable between two positions corresponding respectively to make and break of the circuit controlled by the timer, means driven by the member for moving the operating means to one of its said positions once during a complete movement of the driven member, a second means driven by the member for moving the operating means to the other of its said positions once during a complete movement of the driven member, means manually settable during movement of said member for varying the time interval between the respective movements of the switch-operating means, said member comprising a continuously rotated shaft, and said switch-operating means comprising a sleeve mounted on the shaft and arranged for axial movements thereon.

6. In timers, a driven member, a circuit-controlling switch, switch-operating means movable between two positions corresponding respectively to make and break of the circuit controlled by said switch, means driven by the member for moving the operating means to one of its said positions once during a complete movement of the driven member, a second means driven by the member for moving the operating means to the other of its said positions once during a complete movement of the driven member, means manually settable during movement of said member for varying the time interval between the respective movements of the switch-operating means, said manually settable means comprising an arm, a stop on said arm, and means for rotating the arm about an axis to position the stop adjustably relative to the path of travel of one of said member driven means, and said last mentioned member driven means being arranged for operation by effective contact with said stop.

7. In timers, a continuously driven rotatable shaft, a circuit-controlling switch, switch-operating means comprising a compound lever having a plurality of arms and pivoted for movement so that each arm has two positions and one is operatively associated with the switch and corresponds in its two positions to circuit on and circuit off of the switch, means driven by the shaft for actuating one of the arms of the switchoperating means to urge said one arm to one of its two positions once during a complete rotation of the shaft, a second means driven by the shaft for actuating one of the arms of the switchoperating means to urge said one arm to the other of its two positions once during a complete rotation of the shaft, and means manually settable to predetermine the point of angular movement of one of said driven means at which it is actuated to actuate the arm of the switch-operating means relative to the angular point of operation of the other of said driven means to vary the proportionate time of circuit on to circuit off of said switch.

8. In timers, a continuously driven rotatable shaft, a circuit-controlling switch, switch-operating means comprising a compound lever having a plurality of arms and pivoted formovement so that each arm has two positions and one is ope'ratively associated with the switch and corre- 's-ponds in its two positions to circuit on and circuit off of the switch, means driven by the shaft for actuating one of the arms of the switchoperating means to urge said one arm to one of its two positions once durin a complete rotation of the shaft, a second means driven by the shaft for actuating one of the arms of the switch-operating means to urge said one arm to the other of its two positions once during a complete rotation of' the shaft, means manually settable to predetermine the point of angular movement of one of said driven means at which it is actuated to actuate the arm of the switch-operating means relative to the angular point of operation of the other of said driven means to vary the proportionate time of circuit on and circuit off of said switch, and manual means operative to engage one of said arms to move the switch-operating means positively to and to maintain it in one of its said positions despite the continued actuation of the driven means with the rotation of the shaft.

9; In timers, a continuously driven rotatable shaft, a circuit-controlling switch, switch-operating means comprising a compound lever having a plurality of arms and pivoted for movement so that each arm has two positions and one is operatively associated; with the switch and corresponds in its two positions to circuiton and circuit of the switch, means driven by the shaft for actuating one of the arms of the switchoperating' means to urge said one arm to one of its two positions once during a complete rotation of the shaft, a second means driven by the shaft for actuating one ofthe arms of the switch-operating means to urge said one arm to the other of its two positions once during a complete rotation of the shaft, means manually settable to predetermine the point of angular movement of one of said driven means at which it is actuated to actuate the arm of the switch-operating means relative to the angular point of operation of the other of said driven means to vary the proportionate time of circuit on and circuit off of said switch, said manual means including a cam operative to engage one of said arm-s to moveand maintain the switch-operatingmeans in one of its said positions despite the continued rotation of the-respective driven means.

10-. In timers, a continuously driven rotatable shaft, a circuit-controlling switch, switch-operating means comprisinga compound lever having a plurality of arms and pivoted for movement so that each arm has two positions and one is operatively associated with the switch and corresponds in its two positions to circuit on and circuit off of the switch, means driven by the shaft for actuating oneof the arms of the switchoperating means to urge said one arm to one of its two positions once during a completerotation of the shaft, a second means driven bythe shaft for actuating one of the arms of the switchoperating means to urge said one arm to the other of itstwo positions once during a complete rotation of the shaft, and means manually settable to predetermine the point of angular movement of one of said driven means at which it is. actuated to actuate the arm of the switch.- operating means relative to the angular point of operation of the other of said driven means to vary.- the proportionate time of circuit on to circuit off of said: switch, the setting of. one

1-2 shaft driven actuating means for actuation of the said arm of the switch-operating mean-s being accomplished by the actuation of the other of said driven members and vice versa, in seriai order during the rotation of the shaft.

11. In timers, a continuously driven rotatable shaft, a circuit-controlling switch, switch-oper ating means comprising a compound lever having a plurality of arms and pivoted for movement so that each arm has two positions and one is operatively associated with the switch and corresponds in its two positions to circuit on, and circuit off of the switch, means driven by the shaft for actuating one of the arms of the switchoperating means to urge said one arm to one of its two positions once during a complete rotation of the shaft, a second means driven by the shaft for actuating one of the arms ofthe-switch-oper ating means to urge said one arm to the other of its two positions once durin a complete rotation of the shaft, means manually settable to predetermine the point of angular movement of one of said driven means at which it is actuated to actuate the arm of the switch-operating means relative to the angular point of operation of the other of said driven means to vary the proportionate time of circuit on to circuit off of said switch, and a sleeve mounted on the shaft and engaging an arm, of said switch-operating means and one of said shaft driven members.

12. In timers, a driven shaft, means for driving the shaft at a predetermined speed, a circuit controlling switch, switch operating means comprising a compound lever having a plurality of arms, means pivoting the lever for rocking movement between two positions, one of said arms being operatively associated with the switch to control the on and ofi settings thereof in accordance with the respective positions of the lever, means driven by the shaft for moving the lever between its two positions in variably timed intervals, and a resilient detent bearing against the one of said arms to hold it in each of its attained two positions.

13'. Intimers, a driven shaft, means for driving the shaft at a predetermined constant speed, a circuit controlling switch, a compound lever having a plurality of arms, means pivoting the lever for rocking movements between two positions, one of said arms being operatively associated with. the switch to. control the oii. and, on settings thereof in accordance with the respective positions of the lever, spring detent means: urging the lever to remain in its respective positions, means driven. by the shaft for moving the. lever on. its pivot at variably timed intervals against the resilience of the detentmeans.

14'. In timers, a driven: shaft, means. for driv ing the shaftv at a. predetermined constant; speed; a, circuit controlling switch, a. compound; lever having a. plurality of arms, means pivoting the lever for rocking movements between two posi tions, one of'saidsarmsbeing operativeiyassociated with the switch to; control the off and. on settings thereof in. accordance with. the respective positions, of. the lever, means driven by the shaft for moving the lever on. itspivot at variably timed: intervals, said means comprising twolelemerits mounted on and: driven by theshaft, means operated. by: one element formo-vin the lever in one direction, means operated bytheother'offthe two elementsformoving the lever in: the other di rection, and: means for varying the interval be.- tween the operation. of the;v last two. mentioned means.

15. In timers, a driven shaft, means for driving the shaft at a predetermined constant speed, a circuit controlling switch, a compound lever having a plurality of arms, means pivoting the lever for rocking movements between two positions,

one of said arms being operatively associated with the switch to control the off and on settings thereof in accordance with the respective positions of the lever, means driven by the shaft for moving the lever on its Divot at variably timed intervals, said means comprising two elements mounted on and driven by the shaft, means oper ated by one element for moving the lever in one direction, means operated by the other of the two elements for moving the lever in the other direction, and means for varyin the interval between the operation of the last two mentioned means, said varying means comprising a manually settable lever and means on the lever for operating one of the said two operating means.

16. In timers, a circuit controlling switch, a drive rotatable shaft, means for drivin the shaft at a constant predetermined speed, a pair of elements mounted on the shaft in axially spaced relation, a sleeve slidably mounted on the shaft between the elements, said elements having operating means in substantial axial alignment longitudinally of the shaft, switch controlling means operatively associated with each switch and operated in one direction by one of said operating means on its said element in one angular position of the shaft, said switch controlling means being coupled to the sleeve to move same axially, said operating means on the other of the said elements being coupled to and movable with the sleeve, and manually settable means movable angularly of the shaft from a position in substantial longitudinal alignment with the respective operating means to any desired angular position and disposed as to actuate the operating means of said other element at a predetermined an position of said shaft angularly spaced from one angular position to move the sleeve and switch controlling means.

17. In timers, a circuit controlling switch, a pivoted lever having arms and arranged to operate the switch between on and off, a rotatably driven shaft, means for driving the shaft at a constant speed, a manual control shaft substantially coaxial with the driven shaft, a tripping lever mounted on the manual control shaft and rotatable therewith through substantially 360, a supporting element mounted on and rotatable with the driven shaft in juxta-position to the tripping lever, a bell crank lever pivoted on the supporting element On a pivot substantially tangential to the driven shaft, means on the tripping element for moving the bell crank on its pivot so that one end thereof moves substantially axially of the driven shaft whenever in its rotation with the driven shaft the bell crank is actuated, a sleeve slidably mounted on the driven shaft, means connecting the sleeve and the bell crank to cause them normally to move together, one of the arms of said pivoted lever being connected to said sleeve to move with the sleeve, a second supporting element mounted on and rotatable with the driven shaft axially spaced from the first mentioned supporting element, means on the second supporting element for moving the pivoted lever at a predetermined angular position of the driven shaft as it rotates and thus to axially move the sleeve and also to move the switch to one of its conditions of on or off, the tripping means being angularly settable to vary the interval of angular motion of the driven shaft after the sleeve movement from the means of the second mentioned supporting element has been accomplished to establish the time interval at which the bell crank lever is actuated to urge the sleeve in the other direction to reverse the direction of the switch.

18. In timers, a circuit controlling switch, a pivoted lever having arms and arranged to operate the switch between on and off, a rotatably driven shaft, means for driving the shaft at a constant speed, a manual control shaft substantially coaxial with the driven shaft, a tripping lever mounted on the manual control shaft and rotatable therewith through substantially 360, a supporting element mounted on and rotatable with the driven shaft in juxta-position to the tripping lever, a bell crank lever pivoted on the supporting element on a pivot substantially tangential to the driven shaft, means on the tripping element for moving the bell crank on its pivot so that one end thereof moves substantially axially of the driven shaft whenever in its rotation with the driven shaft the bell crank is actuated, a sleeve slidably mounted on the driven shaft, means connecting the sleeve and the bell crank to cause them normally to move together, one of the arms of said pivoted lever being connected to said sleeve to move with the sleeve, a second supporting element mounted on and rotatable with the driven shaft axially spaced from the first mentioned supporting element, means on the second supporting element for moving the pivoted lever at a predetermined angular position of the driven shaft as it rotates and thus to axially move the sleeve and also to move the switch to one of its conditions of on or off, the tripping means being angularly settable to vary the interval of angular motion of the driven shaft after the sleeve movement from the means of the second mentioned supporting element has been accomplished to establish the time interval at which the bell crank lever is actuated to urged the sleeve in the other direction to reverse the direction of the switch, and means on said tripping lever arranged to directly engage an arm of said pivoted lever in one angular setting of the tripping means to positively move the pivoted lever to establish and maintain a given switch setting, and means responsive to the attainment of such last mentioned maintained switch setting to nullify the operations of both of the means of the respective supporting elements on said shafts.

19. In timers, a dial calibrated from zero to one hundred, means mounting the dial with the intermediate portions of the calibrations at the upper portion, a knob and pointer operative relative to the dial, and time controlled circuit controlling means operatively associated with the pointer for establishing and breaking a given circuit in variably timed intervals each proportional to the relative percentage indicated by the juxtaposition of the pointer and dial.

20. In timers for controlling an electric circuit, a rotatably driven member, a single circuit-controlling switch as the sole circuit-controlling element of the timer, switch operating means movable between two positions corresponding respectively to make and break of the circuit, means in fixed angular relation to the driven member driven by the member for moving the operating means to one of its said positions once during a complete rotation of the driven member, a second means in a fixed angular relation member for moving the operating means to theother of its said positions once during a complete rotation. of the driven member, a selected one of said means of fixed angular relation comprising a tripping element responsive to impingement upon a tripping abutment in instantaneously fixed tripping relation to and lying in the ro-tative path of movement of saidselected means with the driven member, a tripping abutment, andmanual means for angularly moving the tripping abutment for. positioning said tripping abutment in a desired angular position on said path for variably predetermining the time interval between the respective movements of the switch-operating means.

21. In timers for controlling an electric. circult,v a rotatably driven member, a single circuitcontrol-ling switch as: the sole circuit-controlling. element of the timer, switch operating meansmovable between two positions corresponding respectively to make and break of the circuit, means in fixed angular relation to the driven member driven by the member for moving the operating means to one of itsv said positions once during a. complete rotation. of the driven memher; a second means in a fixed angular relation to the driven member and to the first mentionedmeans of fixed angular relation driven by the member for moving. the operating means to the.

other of its said positions once during a complete rotation of the driven member, a selected one of said means. of fixed angular relation comprising a tripping element responsive to impingement upon a, tripping abutment in instantaneously fixed tripping relation to and lying in. therotative pathof movement of said selected means with the driven. member; a. tripping abutment, manual means; for angularly moving the tripping abutment for positioning said tripping abutment in a desired angular position on said path for 40 N umbervariably predetermining the time interval between the respective movements of the switch:

operating means, said switch operating means comprising. a movable lever having a portion juxtaposed to; said path and arranged in its movement tomove said portion relative tosaid path, and means opei-"atively associated with the. manual means for engaging said portion tomove it relatively to said path to hold said lever in a. predetermined position at which the switch cir-- suit is closed.

22. In timers, a cyclically movable: driven. member, a single circuit-controlling switch movable between circuit on and. circuit off posi-- times, a pivotally mountedv switch-operating lever movable between two. positions corresponding to the respective circuit-controlling, positions of said switch, means in relatively fixed relation to the driven member and operable tomove said; lever toward one position once during a completev cycle of. the member, a second means for moving thelever toward the other of its said two positions in opposition to the first movement thereof once during. a complete cycle of themember, said second means comprising an elementrelatively fixed to: the member and a complea mental. device adjustable relative to the element. said element being operable by the device ata variably predetermined point in the cycle of the member to establish a variably predetermined. time interval between the respective movements of the lever.

JENS MORTON.

REFERENCES CITED The following references are of record in. the file of this patent:

UNITED STATES PATENTS Name Date 

